Electromagnet device



C. H. HODGKINS.

ELECIROMAGNET DEVICE.

APPLICATION FILED NOV. 18. 1916.

1,389,140. Patented Aug. 30, 1921.

F'fq \NVENTOR W!TNESSES:

a ATTORNEY Charles H. Hodqkins.

UNITED sTATss PATENT OFFICE.

CHARLES H. HODGKINS, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO HOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF VANIA.

Application filed November 1a, 1916.

To all whom, it may concern.

Be it known that I, CHARLES H. Honomiv's, a subject of the King of Great Britain, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Electromagnet Devices, of which the followm is a specification.

.ly invention relates to electromagnetic devices and particularly to time-element relays. I y

One object of my invention isto provide means \vhereb the load-setting'of a relay may be varie by properly turning one of the cooperating members of its, time-element device.

Another object of my invention is to provide means whereby a relay of the above indicated character shall have a substantially quick action after the lapse of a predetermined interval of time, as determined by the settino of its time-element.

A urther object of my invention is to provide a device of the above indicated character that shall be simple to construct and effective in its operation. a

In the carrying out ofmy invention 1' provide a. relay of the solenoidtype having movable and stationary magne'tizable core members and a winding. A cylindrical internally screw-threaded member is attached to the under side of the stationary core memher and is adapted to receive an externally screw-threaded cup member in which a piston, that is operatively connected to the movable core member of the relay, is disposed. Portions of the interior surface of the cup member are cut away near the top thereof in order that, when the piston has advanced to positions adjacent the cut-away portions. the action of the relay will be relatively quick. The load setting of the relay may be adjusted by turning the cup member with respect to the cylini'lrical member. thereby moving the Same longitudinally to vary the air gap between the magnetizable core members.

in the :iccoinpanying drawings, Figure l is a side view. partially in section and partially in elevation. of a. relay embodying my inn-idiom. Fig. 2 is a view tulccn on the line ll ll of big. l. and Fig. ll is a detail view of ii ortion of the device shown in Figs. 1 and .2.

- Specification of Letters Patent.

WESTING- PENNSYL- ELECTROMAGNET DEVICE.

Patented Aug. 30, 1921.

Serial No. 132,086.

The relay 1 comprises, in general, a statlonary'magnetizable core member 2, a movable magnetizable core member 3, a Winding land a time-element and load-adjusting device 5. V

The load-adjusting and time-element device 5 comprises a cylindrical internally screw-threaded member 6 that is operatively connected, at one of its ends, to the lower side 7 of the stationary magnetizable core member 2. A substantially cylindrical cup member 8 having an externally screwthreaided flange 9 is adapted to be received by the cylindrical member 6 and is provided with a groove 10 in its outer surface, to receive a holding spring 11 that is secured to the outer surface 0 the cylindrical member 6. A piston 12 of substantially cup shape is secured to the lower end of the movable core member 3. The piston 12 is provided with a plurality of relatively large openings 13 and a phirality of relatively small openings 14. A Washer member 15 is loosely disposed in the piston and is of such shape that it is adapted to normally cover the openings 13 but not the'openin 14. A segmental washer member 16 is dlsposed on the under side of the piston 12 and is adapted to be secured in any desired position by a nut 17. The washer member 16 is adapted to be so turned that any number of the openings 14 may be uncovered to secure any desired cooperation between the members of the dash pot, and, consequently, any time-element in the opera tion of the relay. At least one of the openings 14 is adapted to be uncovered under all conditions to preclude the danger of the relay not operating under some conditions.

The piston 12 is adapted to slidably engage the interior of the cup in order that an inverse time-element may be obtained in the operation of the relay. The interior surface of the cup 8 is cut away at points 18 near its upper edge in order that, when the piston 12 has advanced to positions adjacent the cut-away portions, the operation of the movable core member 3 will be materially speeded up.

ln order to change the load selling oi the device 1. the cup 8 is turned. and, in so turir ing, is moved longitudinally with respect to the member 6 to cause the movable core member fl to be moved either toward or away from the central portion 19 of the stationary core member 2. Thus, the load or current traversing the winding 4, at which it is desirable that the movable core member be actuated, may be readily adjusted. That is, the spring 11 may be adapted to cooperate with a scale (not shown) that may be marked on the outer surface of the cup 8 to indicate the load settingof the device. The spring 11 is adapted to be moved out of engagement with the groove 10 when the cup 8 is turned but will maintain the correct load setting of the device against accidental movement of the cup 8 when it is seatedin the groove 10.

I do not limit my invention to the particular structure'illustrated, as it may be variously modified without departing from the spirit and scope of the invention as set forth in the appended claims.

I claim as my invention:

1. A time-element relay comprising movable and stationary magnetizable members, an internally screw-threaded inclosin casing mounted'on the stationary magnetizable member, a movable piston connected to the movable inagnetizable member and an externally screw-threaded cooperating dashpot member for the piston adapted to be screwed into and out of the inclosing casing for adjusting the load settin of the relay throughout the length of the dash-pot memher.

2. A time-element relay comprising movable and stationary magnetizable members, an internally screw-threaded inclosi casing mounted'on the stationary magnetizable membeiya movable piston connected to the movable magnetizable member and an externally screw-threaded cooperating dashpot member for the piston adapted to be screwed into and out of the inclosing casing to permit engagement of the piston with a portion of the dash-pot member throughout its length.

3. In a relay, the combination with stationary and movable core members, of a cylindrical internally screw-threaded inclosing casing disposed on the lower side of the stationary core member, a cup member adapted to be screwed into the cylindrical casing and having portions of its inner surface cut away toward the upper end thereof, and a piston attached to the movable core member and disposed normally in the lower portion of the said cup member whereby turning the cup member adjusts the initial position of the movable core member.

4. In a relay, the combination with sta tionary and movable core members, of a cylindrical internally screw-threaded casing disposed on the lower side of the stationary core member, a cup adapted to be screwed into the cylindrical casing and having portions of its inner surface cut away toward the upper portion thereof, and a piston at tached to the movable core member and so disposed in the said cup that when the cup is turned the position of the movable core member is changed.

5. In a relay, the combination with sta tionary and movable magnetizable members, of a cylindrical internally screw-threaded inclosing casing disposed on the lower side of the stationary magnetizable member, a cup member adapted to be screwed into the cylindrical casing, and a piston attached to the movable magnetizable member and cooperatin with the cup member to permit acceleration of the piston toward the end of its travel.

6. In a relay, the combination with stationary and movable magnetizable members, of a cylindrical inclosing casing disposed on the lower side of the stationary magnetizable member, a cup member adapted to be advanced into the casing, a piston attached to the movable magnetizable member, and means for so supporting the cup member on the cylindrical member as to permit the piston to move throughout the length of the cu member.

n testimony whereof, I have hereunto subscribed my name this 31st day of Oct,

CHARLES H. HODGKINS. 

